THE XO PLANETARY SURVEY PROJECT: ASTROPHYSICAL FALSE POSITIVES

By R. Poleski, P. McCullough, J. Valenti, C. Burke, P. Machálek, K. Janes. 2010

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Searches for planetary transits find many astrophysical false positives as a by-product. There are four main types analyzed in the literature: a grazing-incidence eclipsing binary (EB) star, an EB star with a small radius companion star, a blend of one or more stars with an unrelated EB star, and a physical triple star system. We present a list of 69 astrophysical false positives that had been identified as candidates of transiting planets of the on-going XO survey. This list may be useful in order to avoid redundant observation and characterization of these particular candidates that have been independently identified by other wide-field searches for transiting planets. The list may be useful for those modeling the yield of the XO survey and surveys similar to it. Subsequent observations of some of the listed stars may improve mass–radius relations, especially for low-mass stars. From the candidates exhibiting eclipses, we report three new spectroscopic double-line binaries and give mass function estimations for 15 single-line spectroscopic binaries.

Subfields: Astronomy and Astrophysics, Computational Mechanics, Instrumentation

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Citations in the corpus

A SYSTEMATIC SEARCH FOR TRANSITING PLANETS IN THE K2 DATA (2015, background): “In fact, the follow-up process to try to rule out such astrophysical false positives is a large portion of the effort that goes into a transit survey (e.g., O’Donovan et al. 2006; Almenara et al. 2009; Poleski et al. 2010).”
ON THE LOW FALSE POSITIVE PROBABILITIES OF KEPLER PLANET CANDIDATES (2011, background): “After all transit searches up until now, both ground-based (e.g. HAT, WASP) and space-based (e.g. CoRoT) been plagued by false positives (Konacki et al. 2003; O’Donovan et al. 2006; Poleski et al. 2010; Almenara et al. 2009).”
Precise time series photometry for the Kepler-2.0 mission (2014, background): “Of these, two are bona-fide transit-like events: the known transiting planet WASP-28, and an astrophysical false positive (diluted eclipsing binary) previously identified by the XO project (Poleski et al. 2010).”